Tungsten Copper Information

What is tungsten copper alloy

Tungsten copper alloy is a pseudo-alloy of copper and tungsten. As copper and tungsten are not mutually soluble, the material is composed of distinct particles of one metal dispersed in a matrix of the other one. The microstructure is therefore rather a metal matrix composite instead of a true alloy.

Tungsten-based alloy material

The material combines the properties of both metals, resulting in a material that is heat-resistant, ablation-resistant, highly thermally and electrically conductive, and easy to machine.

Parts are made from the CuW alloy by pressing the tungsten particles into a desired shape, sintering the compacted part, then infiltrating with molten copper. Sheets, rods and bars of the alloy are available as well.

Commonly used tungsten copper alloy contains 10–50 wt.% of copper, the remaining portion being mostly tungsten. The typical properties of the alloy depend on its composition. The alloy with less wt.% of copper has higher density, higher hardness and higher resistivity. The typical density of CuW90 alloy, with 10% of copper, is 16.75 g/cm3 and 11.85 g/cm3 for CuW50 alloy. CuW90 has higher hardness and resistivity of 260 HB kgf/mm2 and 6.5 ?Ω.cm than CuW50.

Typical properties of commonly used tungsten copper composition

Composition Density Hardness Resistivity IACS Bending strength
wt.?% g/cm3≥ HB Kgf/mm2≥ ?Ω.cm≤ ?%≥ Mpa≥
W50/Cu50 11.85 115 3.2 54
W55/Cu45 12.30 125 3.5 49
W60/Cu40 12.75 140 3.7 47
W65/Cu35 13.30 155 3.9 44
W70/Cu30 13.80 175 4.1 42 790
W75/Cu25 14.50 195 4.5 38 885
W80/Cu20 15.15 220 5.0 34 980
W85/Cu15 15.90 240 5.7 30 1080
W90/Cu10 16.75 260 6.5 27 1160


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